What are the units of ballistic coefficient?

Ballistic coefficient has units of lb/in² or kg/m². BCs for bullets are normally stated in lb/in² by their manufacturers without referring to this unit. The values for BC can be as low as 0.12 and as high as 1.00 for commonly used bullets.

How is ballistic coefficient calculated?

In words, the Ballistic Coefficient of a bullet is it’s sectional density divided by its form factor. Sectional density is easy to calculate because it simply depends on the bullets caliber and weight. For example, the sectional density of a 175 grain . 308 caliber bullet is: 175/7000/(.

What is the ballistic coefficient of a 308?

around .248
308 Winchester bullet has a BC of around . 248, whereas more streamlined and heavier 190-grain spire point boat tail . 308 bullets often have a BC exceeding .

What is ballistic coefficient C?

In ballistics, the ballistic coefficient (BC, Cb) of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the negative acceleration: a high number indicates a low negative acceleration—the drag on the body is small in proportion to its mass.

What is the ballistic coefficient of a 6.5 Creedmoor?

The Hornady 6.5 Creedmoor 140 grain A-MAX boasts a Ballistic Coefficient of . 585 and muzzle velocity of 2710 FPS.

What should I zero my 308 at?

308 Winchester 2,800 fps, we’d have to aim 369 inches above a 1,000-yard target to drop our bullet on it. That’s 30.75 feet of drop. At a more common, reasonable hunting range of 300 yards that drop would “only” be about 23 inches. Meaning if you aimed a foot over the deer’s back, you might hit it in the heart.

What is the ballistic coefficient of a 30 06?

.30-06 Springfield

Bullet mass/type Velocity Energy
165 gr (11 g) BTSP 2,800 ft/s (850 m/s) 2,872 ft⋅lbf (3,894 J)
180 gr (12 g) Core-Lokt Soft Point 2,700 ft/s (820 m/s) 2,913 ft⋅lbf (3,949 J)
200 gr (13 g) Partition 2,569 ft/s (783 m/s) 2,932 ft⋅lbf (3,975 J)
220 gr (14 g) RN 2,500 ft/s (760 m/s) 3,036 ft⋅lbf (4,116 J)

What distance should a 308 be sighted in?

How far is 308 accurate to?

308 an adequate cartridge out to 500 yards, but beyond that you’ll need to show me a bullet that will perform well at that distance. Before you say it, yes, I am aware that the . 308 has done decades of duty as the go-to sniper rifle cartridge for our military.

How much does a .308 bullet drop at 600 yards?

.308 Winchester, 168-grain BTHP Match

[100-Yard Zero]
Range/Yards Bullet Path MOA Elev
575 -94.41″ 16.41
600 -106.10″ 17.68
625 -118.71″ 18.99

How do I calculate the ballistic coefficient?

BCSmallarms = Ballistic coefficient

  • SD = Sectional density
  • i = Coefficient of form (form factor )
  • What is the best ballistic coefficient?

    G1 or Ingalls (flat base with 2 caliber (blunt) nose ogive – by far the most popular)

  • G2 (Aberdeen J projectile)
  • G5 (short 7.5° boat-tail,6.19 calibers long tangent ogive)
  • G6 (flat base,6 calibers long secant ogive)
  • G7 (long 7.5° boat-tail,10 calibers tangent ogive,preferred by some manufacturers for very-low-drag bullets)
  • How to determine ballistic coefficient?

    Cb,Smallarms,ballistic coefficient

  • SD,sectional density
  • i,coefficient of form (form factor)
  • What is the formula for ballistic coefficient?

    Ballistic coefficient has units of mass per area (lb/in 2 or kg/m 2) The formula for the Ballistic Coefficient is: BC = M Cd ⋅A B C = M C d ⋅ A. where: BC = Ballistic Coefficient. M = Mass of Projectile. C d = Coefficient of Drag. A = Cross-sectional Area of Projectile.